The One Zoo Three star shared the happy news with his followers on Instagram today.

Whitnall posted a photograph of his newborn daughter sleeping under an elephant-print blanket and wearing an animal-print hat.

Announcing the arrival, he wrote: “Our beautiful daughter is here. Tillie Grace Whitnall. 12.10.2026.

“Welcome to the family Tillie. Alfie is already loving life as a big brother!

“Our little family of four,” he added, alongside a red heart emoji.

Whitnall and his wife Carly are already parents to two-year-old son Alfie.

The programme, which launched in 2020, follows the brothers as they work with animals and support conservation efforts at Paradise Wildlife Park in Hertfordshire.

Whitnall is also a director of the wildlife park and a trustee of The Big Cat Sanctuary in Kent.